On the “ Ctrripede” Lepidocoleus. 653 
LXXVII.—The “ Cirripede”’ Lepidocoleus in the Upper 
Ordovician Rocks of Scotland. By THomas H. Wrrners, 
PGS. 
[Plate X. figs. 1-5.] 
(Published by permission of the Trustees of the British Museum.) 
Tue acquisition by the Geological Department of the British 
Museum of the well-known collection of Mrs. Robt. Gray, of 
Edinburgh, has brought to notice certain small fossils, which 
were included with the Annelida, since they are the speci- 
mens which, Dr. Cowper Reed (1908, p. 293, pl. xii. 
figs. 9, 10) described and figured as an Annelidan Tube (?), 
allied to Cornulites and Conchicolites. 
Examination of these specimens shows, without any doubt, 
that they represent a species of the genus Lepidocoleus, 
a form which is generally accepted as belonging to the 
Cirripedia. 
The genus Lepidocoleus is known by several species 
(Withers, 1915, pp. 121-2) from the Ordovician, Silurian, 
and Devonian rocks of Europe and North America, but so 
far it has not been recorded, as such, from the Paleozoic 
rocks of this country. We now have, however, the present 
specimens from the Ordovician of Scotland, and the genus 
is represented in the English Silurian by species occurring 
in the Wenlock beds of Dudley and Malvern. 
Genus Lepipocoteus, Faber. 
The shell of this genus is composed of two columns of 
plates, square to oblong in shape, aud these combine to form 
a blade-shaped shell, which opens along the sharp “free ” 
margin, and along the broad ‘ fixed” margin there is a 
narrow median groove formed between the incurved and 
rounded margins of the plates; at the apex the shell 
tapers to a point, and although it also tapers slightly 
towards the base, it is there somewhat broadly rounded ; 
the plates overlap each other from behind forwards, 
sometimes to as much as half their length. In some 
species the plates of each column alternate with each 
other to some extent, but in others there is a little or no 
alternation. The umbo of each plate is apical and is situated 
on the outer edge of the median groove at the “ fixed” 
margin, and there each plate is rather abruptly deflected 
inwards, but in the plates of the left-hand series this 
deflected portion is slightly wider, aud bent outwards 
